09-13 HONDA TRX420R4X4: HMF Utility Slip-On Exhaust (Brushed Aluminum) HMF pulls on the years of experience in ATV racing to produce an exhaust that offers performance, good sound and a stylish look at the same time. HMF designed and constructed the Utility Slip-on Exhaust with a T-6061 aerospace grade aluminum canister for maximum performance on 4-stroke utility quads.Designed for 4-stroke utility quads.T-6061 aerospace grade aluminum canister with solid construction